Communism or democracy have nothing to do with the discussion. By inserting that into the discussion, you're starting to bite at the moonbats baiting you into distration by claiming knives aren't inherently as dangerous as firearms. What we're trying to fairly compare is events caused by a crazy person on an unarmed population. The government (or lack thereof) has very little to do with the discussion.
What is apparent is this guy is so lousy with a knife, he couldn't succeed in killing little children. Even a standard 4" blade, when swiped across a torso will nearly open up a square foot of flesh, vessels, and internal organs. Take a sheet of printer paper and fold it in half. That demonstrates the cross-sectional area a skilled attacker can open up on a human being without much trouble.
William Unek knew what he was doing. His rampage took 21 lives, armed with only an axe. He escaped and killed another 36 with another axe and a stolen police gun. If you're going up against people that use the recent China incident as an example of how sharp objects are less deadly, use William Unek.
https://en.wikipedia.org/wiki/William_Unek
Li Xianliang also grabbed a front-end loader and smashed 17 people into pieces. That's something anyone can do.
https://en.wikipedia.org/wiki/Hebei_tractor_rampage
Yang Jia ran INTO a police station and killed six cops with a knife before he was subdued.
https://en.wikipedia.org/wiki/Yang_Jia
The unsuccessful nature of the 22-injured-victims knife attacker shows that he was rather lousy with a knife, not that knives are inherently less lethal. A knife in most municipalities is still classified as a lethal weapon.